JRuby 1.7.5 is here!

We fixed a number of issues with JRuby’s support for invokedynamic, but due to increased memory requirements and some lingering issues we have opted to leave it disabled until Java 8 (due in March). Users willing to bump up memory use (PermGen, specifically) can still enable invokedynamic via -Xcompile.invokedynamic=true. We also encourage users to try their apps on early access builds of Java 8.